Silica sol for adsorption resin

#Application ·2025-08-21 16:58:32

• Characteristics
  • High specific surface area: The specific surface area of silica particles in silica sol is generally 150-300m²/g. The large specific surface area endows silica sol with excellent adsorption capacity, providing more adsorption sites for adsorption resins and thereby enhancing the adsorption performance of adsorption resins.
  • Small and uniform particle size: Its particle size is usually 10-20 nanometers. The tiny and uniform particle size can be evenly dispersed in the adsorption resin, ensuring the consistency and stability of the adsorption resin's performance, which is conducive to improving the adsorption efficiency and adsorption capacity.
  • High surface activity: The surface of silica sol is covered with hydroxyl groups (-OH), which endow it with strong chemical activity and enable it to interact with the molecular chains of adsorption resins, such as forming hydrogen bonds or chemical bonds, thereby enhancing the binding force between silica sol and adsorption resins and improving the performance of adsorption resins.
  • Good stability: The particle surface of silica sol carries a negative charge and repels each other, thus it can remain stable for a long time and is not prone to sedimentation. This enables silica sol to maintain a good dispersed state during the production process of adsorption resin, facilitating processing and application.
  • Low sodium content: Generally, the Na₂O content in silica sol is about 0.3%-0.5%. A low sodium content can prevent adverse effects on the performance of adsorption resins, ensuring the purity and adsorption effect of the adsorption resins. It is especially suitable for adsorption resin systems with strict requirements for sodium content.
• Its role in adsorption resins
  • Improving adsorption performance: The high specific surface area and surface hydroxyl groups of silica sol enable it to adsorb various substances, such as heavy metal ions in wastewater treatment. When applied to adsorption resins, it can significantly enhance the adsorption capacity and selectivity of the adsorption resins for target substances.
  • Enhancing mechanical strength: The colloidal properties of silica sol enable it to play a filling and reinforcing role in adsorption resins, which can improve the mechanical properties of adsorption resins, making the resin particles more solid and less prone to breakage, thereby increasing the service life and stability of adsorption resins.
  • Improving weather resistance: Silica sol can enhance the weather resistance of adsorption resins, enabling them to maintain good adsorption and physical properties under various environmental conditions, such as changes in temperature and humidity, and reducing the impact of environmental factors on the performance of adsorption resins.
  • Adjusting pore size structure: By controlling the particle size and addition amount of silica sol, the pore size structure of the adsorption resin can be adjusted to make it more suitable for the adsorption of specific target molecules and optimize the adsorption performance of the adsorption resin.
• Application field
  • In the field of water treatment: It is used to prepare adsorption resins for removing heavy metal ions, organic substances, pigments and other pollutants from water, such as treating industrial wastewater containing heavy metal ions like lead, mercury and cadmium, as well as removing phenols, pesticide residues and other organic substances from water, thereby enhancing the purification effect of water quality.
  • Food and beverage industry: It can be used to prepare adsorption resins to remove impurities, odors, pigments, etc. from food and beverages, such as in the clarification of fruit juice and the filtration of beer, to improve the quality and purity of the products.
  • In the pharmaceutical field: It is used to prepare adsorption resins for the separation, purification and enrichment of drugs, such as separating active ingredients from traditional Chinese medicine extracts, or removing impurities and harmful substances during the drug production process to improve the purity and quality of drugs.
  • In the field of chemical engineering: It is used to prepare adsorption resins, to separate and purify chemical raw materials and products, such as separating organic compounds in petrochemicals and purifying intermediates in fine chemicals, etc., to improve the efficiency of chemical production and product quality.